Где «resolvconf» получает IP-адреса DNS-серверов?

На компьютере-сервере у меня есть файл /etc/network/interfaces, похожий на:

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto eth0
iface eth0 inet static
    address 192.168.1.35
    netmask 255.255.252.0 
    network 192.168.0.0
    broadcast 192.168.3.255
    gateway 192.168.1.1 
    dns-nameservers 192.168.1.3 192.168.1.4
    dns-search example.com

При запуске resolvconf -u файл /etc/resolv.conf становится:

# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
#     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 192.168.1.3
nameserver 192.168.1.4
search pelicandd.com
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
#     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 192.168.1.13